Colored alkali aluminosilicate glass articles

ABSTRACT

A glass article including at least about 40 mol % SiO 2  and, optionally, a colorant imparting a preselected color is disclosed. In general, the glass includes, in mol %, from about 40-70 SiO 2 , 0-25 Al 2 O 3 , 0-10 B 2 O 3 ; 5-35 Na 2 O, 0-2.5 K 2 O, 0-8.5 MgO, 0-2 ZnO, 0-10% P 2 O 5  and 0-1.5 CaO. As a result of ion exchange, the glass includes a compressive stress (σ s ) at at least one surface and, optionally, a color. In one method, communicating a colored glass with an ion exchange bath imparts σ s  while in another; communicating imparts σ s  and a preselected color. In the former, a colorant is part of the glass batch while in the latter; it is part of the bath. In each, the colorant includes one or more metal containing dopants formulated to impart to a preselected color. Examples of one or more metal containing dopants include one or more transition and/or rare earth metals.

This application claims the benefit of priority under 35 U.S.C. §119 ofU.S. Provisional Application Ser. No. 61/565,196 filed on Nov. 30, 2011the content of which is relied upon and incorporated herein by referencein its entirety.

BACKGROUND

1. Field

Aspects of embodiments and/or embodiments of this disclosure generallyrelate to the field of glass materials technology and more specificallyto the field of alkali aluminosilicate glass materials technology. Also,aspects of embodiments and/or embodiments of this disclosure aredirected to one or more of: an ion exchangeable colored glasscomposition that substantially maintains its original color following anion exchange treatment; an ion exchangeable, colorable glass compositionto which a preselected color can be imparted by an ion exchangetreatment; an ion exchanged (IOX) colored glass composition; an articleor machine or equipment of or including an IOX colored glasscomposition; and one or more processes for making an IOX colored glasscomposition.

2. Technical Background

Glass articles are commonly utilized in a variety of consumer andcommercial applications such as electronic applications, automotiveapplications, and even architectural applications. For example, consumerelectronic devices, such as mobile phones, computer monitors, GPSdevices, televisions and the like, commonly incorporate glass substratesas part of a display. In some of these devices, the glass substrate isalso utilized to enable touch functionality, such as when the displaysare touch screens. As many of these devices are portable, it can bedesirable that the glass articles incorporated in such devices besufficiently robust to tolerate impact and/or damage, such as scratchesand the like, during both use and transport.

Corning GORILLA® glass, a clear alkali aluminosilicate glass, has been asuccessful product due to its ability to achieve high strength anddamage resistance. To date, this alkali aluminosilicate glass has beenprimarily used for applications that require transmission of visiblelight. However, new potential applications relating to product color(s)and/or aesthetics as not addressed by clear alkali aluminosilicateglasses.

The problem(s) of attaining product color(s) and/or aesthetics aresolved by one or more ion exchangeable colored glass compositions thatsubstantially maintain their original color following an ion exchangetreatment (IOX); one or more ion exchangeable, colorable glasscompositions to which one or more preselected colors can be imparted byan ion exchange treatment (IOX); one or more ion exchanged (IOX) coloredglass compositions; and one or more processes for making one or more IOXcolored glass compositions. Such one or more ion exchangeable coloredglass compositions and/or one or more ion exchangeable, colorable glasscompositions can combine the ion exchangeability characteristics ofGORILLA® glass with the depth and breadth colors found in stained artglass. In aspects, such one or more ion exchangeable colored glasscompositions exhibit colorfastness following an ion exchange treatment(IOX). Also, such one or more IOX colored glass compositions combine thehigh strength and damage resistance of GORILLA® glass with the depth andbreadth colors found in stained art glass. To that end, the forgoing oneor more glass compositions might be utilized and/or incorporated, forexample, in personal electronic devices as an underside or backplatesand/or household appliances as protective shells/casings.

Additionally, the problem(s) of attaining product color(s) and/oraesthetics on an industrial scale are solved by the forgoing one or moreglass compositions being compatible with large-scale sheet glassmanufacturing methods, such as down-draw processes and slot-drawprocesses that are commonly used today in the manufacture thin glasssubstrates, for example, for incorporation into electronic devices.

SUMMARY

Some aspects of embodiments and/or embodiments of this disclosure relateto one or more ion exchangeable colored glass compositions thatsubstantially maintain their original color following an ion exchangetreatment (IOX); one or more ion exchangeable, colorable glasscompositions to which one or more preselected colors can be imparted byan ion exchange treatment (IOX); one or more IOX colored glasscompositions; and one or more processes for making one or more IOXcolored glass compositions.

As to some aspects relating to compositions, such one or more ionexchangeable colored glass compositions and/or such one or more ionexchangeable, colorable glass compositions and/or such one or more IOXcolored glass compositions included at least about 40 mol % SiO₂. As toother aspects, such one or more ion exchangeable colored glasscompositions and/or such one or more IOX colored glass compositionsinclude one or more metal containing dopants formulated to impart apreselected color (e.g., any one or more of any of preselected hue{e.g., shades of red, orange, yellow, green, blue, and violet},preselected saturation, preselected brightness, and/or preselectedgloss).

As to other aspects, such one or more ion exchangeable colored glasscompositions and/or such one or more ion exchangeable, colorable glasscompositions are formulated so that, following an ion exchange treatment(IOX), for example, up to about 64 hours, the IOX colored glass has atleast one surface under a compressive stress (σ_(s)) of at least about500 MPa and a depth of layer (DOL) of at least about 15 μm.

As to aspects relating to one or more ion exchangeable colored glasscompositions, such compositions are formulated so that, following an ionexchange treatment (IOX) up to about 64 hours, the color substantiallyretains its original hue without fading or running (e.g., issubstantially color fast). In aspects relating to substantial colorretention, a color difference in the CIELAB color space coordinates of apreselected color of such one or more ion exchangeable glasscompositions after an IOX treatment and before the IOX treatment may becharacterized by ΔE=[{ΔL*}²+{Δa*}²+{Δb*}²]^(0.5) determined fromspecular transmittance measurements using a spectrophotometer.

Returning to aspects relating to compositions, such one or more ionexchangeable colored glass compositions and/or such one or more ionexchangeable, colorable glass compositions and/or such one or more IOXcolored glass compositions also might include SiO₂ from about 40 mol %to about 70 mol %; Al₂O₃ comprises from about 0 mol % to about 25 mol %;B₂O₃ comprises from 0 mol % to about 10 mol %; Na₂O comprises from about5 mol % to about 35 mol %; K₂O comprises from 0 mol % to about 2.5 mol%; MgO comprises from 0 mol % to about 8.5 mol %; ZnO comprises from 0mol % to about 2 mol %; P₂O₅ comprises from about 0 to about 10%; CaOcomprises from 0 mol % to about 1.5 mol %; Rb₂O comprises from 0 mol %to about 20 mol %; and Cs₂O comprises from 0 mol % to about 20 mol %. Itwill be appreciated that one of more sub-ranges of any one or more ofthe preceding are contemplated.

Other aspects of embodiments and/or embodiments of this disclosurerelate to a method of making a colored glass article having at least onesurface under a compressive stress (σ_(s)) and a depth of layer (DOL)and a preselected colored. Such method can include communicating atleast one surface of an aluminosilicate glass article, which has SiO₂ atleast about 40 mol %, and a bath including one or more metal containingdopant sources and in amounts formulated to impart a preselected colorto the aluminosilicate glass article by an ion exchange treatment of thealuminosilicate glass article at a temperature, for example, betweenabout 350° C. and about 500° C. for a sufficient time up to about 64hours to impart the compressive stress (∝_(s)), the depth of layer(DOL), and the preselected color at the at least one surface of thealuminosilicate glass. It will be appreciated, that in some otheraspects, the compressive stress (σ_(s)) might be at least about 500 MPawhile the depth of layer (DOL) might at least about 15 μm. In aspects, abath is formulated using one or more salts including one or morestrengthening ion sources, such as, for example, a potassium source; theone or more metal containing dopant sources; and a melting temperatureless than or equal to the ion exchange treatment temperature. In otheraspects, the one or more salts might be a formulation of one or more ofa metal halide, cyanide, carbonate, chromate, a nitrogen oxide radical,manganate, molybdate, chlorate, sulfide, sulfite, sulfate, vanadyl,vanadate, tungstate, and combinations of two or more of the proceeding,alternatively, a formulation of one or more of a metal halide,carbonate, chromate, a nitrate, manganate, sulfide, sulfite, sulfate,vanadyl, vanadate, and combinations of two or more of the proceeding.

In any aspects relating to one or more ion exchangeable colored glasscompositions that substantially maintain their original color followingan IOX; one or more ion exchangeable, colorable glass compositions towhich one or more preselected colors can be imparted by an IOX; one ormore IOX colored glass compositions; and/or one or more processes formaking one or more IOX colored glass compositions, an ion exchangetreatment (IOX) might be performed at between about 350° C. and 500° C.and/or between about 1 hour and 64 hours.

Also in any aspects relating to such one or more ion exchangeablecolored glass compositions and/or such one or more ion exchangeable,colorable glass compositions and/or such one or more IOX colored glasscompositions, a glass article having a thickness of up to about 1 mm ormore might be made using such compositions.

In any aspects relating to one or more ion exchangeable colored glasscompositions that substantially maintain their original color followingan IOX; one or more ion exchangeable, colorable glass compositions towhich one or more preselected colors can be imparted by an IOX; one ormore IOX colored glass compositions; and/or one or more processes formaking one or more IOX colored glass compositions, a colorant mightinclude one or more metal containing dopants in amounts formulated toimpart a preselected color (e.g., any one or more of any of preselectedhue {e.g., shades of red, orange, yellow, green, blue, and violet},preselected saturation, preselected brightness, and/or preselectedgloss) to the glass. Such one or more metal containing dopants include,in some aspects, one or more of transition metals, one or more of rareearth metals, or one or more of transition metals and one or more ofrare earth metals; in other aspects, one or more of one or more of Au,Ag, Cu, Ni, Co, Fe, Mn, Cr, V, Ti, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy,Ho, Er, Tm, Yb, and Lu; in still other aspects, one or more metalcontaining dopants formulated to impart a preselected color comprisesone or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, and V.

Yet other aspects of embodiments and/or embodiments of this disclosurerelate to one or more methods of making one or more colorfast, ionexchangeable glass compositions as disclosed and described herein. Insome aspect, the one or more methods impart the one or more glassarticles with a layer under a compressive stress (σ_(s)) and a depth oflayer (DOL), the layer extending from a surface of the glass articletoward the depth of layer. The one or more methods can involvesubjecting at one surface of an alkali aluminosilicate glass article toan ion exchanging bath at a temperature of up to about 500° C. for up toabout 64 hours, optionally, up to about 16 hours, for a sufficient timeto form the layer. In further aspects, the bath can comprise at least atleast a colorant including one or more metal containing dopantsformulated to impart a preselected color as disclosed and describedherein.

Numerous other aspects of embodiments, embodiments, features, andadvantages of this disclosure will appear from the following descriptionand the accompanying drawings. In the description and/or theaccompanying drawings, reference is made to exemplary aspects ofembodiments and/or embodiments of this disclosure which can be appliedindividually or combined in any way with each other. Such aspects ofembodiments and/or embodiments do not represent the full scope of thisdisclosure. Reference should therefore be made to the claims herein forinterpreting the full scope of this disclosure. In the interest ofbrevity and conciseness, any ranges of values set forth in thisspecification contemplate all values within the range and are to beconstrued as support for claims reciting any sub-ranges having endpointswhich are real number values within the specified range in question. Byway of a hypothetical illustrative example, a recitation in thisdisclosure of a range of from about 1 to 5 shall be considered tosupport claims to any of the following ranges: 1-5; 1-4; 1-3; 1-2; 2-5;2-4; 2-3; 3-5; 3-4; and 4-5. Also in the interest of brevity andconciseness, it is to be understood that such terms as “is,” “are,”“includes,” “having,” “comprises,” and the like are words of convenienceand are not to be construed as limiting terms and yet may encompass theterms “comprises,” “consists essentially of,” “consists of,” and thelike as is appropriate.

These and other aspects, advantages, and salient features of thisdisclosure will become apparent from the following description, theaccompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings referenced herein form a part of the specification.Features shown in the drawings are meant to be illustrative of some, butnot all, embodiments of this disclosure, unless otherwise explicitlyindicated, and implications to the contrary are otherwise not to bemade. Although like reference numerals correspond to similar, though notnecessarily identical, components and/or features in the drawings, forthe sake of brevity, reference numerals or features having a previouslydescribed function may not necessarily be described in connection withother drawings in which such components and/or features appear.

FIG. 1 shows a matrix of photographs (which have been converted fromcolor to black-gray-white) illustrating a retention of original huewithout fading or running (e.g., colorfastness) of ion exchangeablecolored glass compositions and IOX colored glass compositions madeaccording to aspects of embodiments and/or embodiments of thisdisclosure;

FIG. 2 shows the compressive stress (σ_(s)) as a function of ionexchange treatment (IOX) time (t [h]) at 410° C. for substrates of IOXcolored glass compositions (i.e., Samples 1-18) according to aspects ofembodiments and/or embodiments of this disclosure;

FIG. 3 shows the depth of layer (DOL) as a function of IOX time (t [h])at 410° C. for the substrates of IOX colored glass compositions (i.e.,Samples 1-18) of FIG. 2 according to aspects of embodiments and/orembodiments of this disclosure;

FIG. 4 shows the transmittance [%] as a function of wavelength, λ [nm],for the substrates of IOX colored glass compositions (i.e., Samples 1-6)made by an IOX at 410° C. for 2 [h] according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 5 shows the transmittance [%] as a function of wavelength, λ [nm],for substrates of ion exchangeable Glass A colored using a iron (Fe)dopant and corresponding IOX colored glass compositions IOX at 450° C.for 2 [h], 410° C. for 32 [h], and 410° C. for 64 [h] (i.e., Samples 19,25, & 31, respectively) of FIG. 1 according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 6 shows the transmittance [%] as a function of wavelength, λ [nm],for substrates of ion exchangeable Glass B colored using a vanadium (V)dopant and corresponding IOX colored glass compositions IOX at 450° C.for 2 [h], 410° C. for 32 [h], and 410° C. for 64 [h] (i.e., Samples 20,26, & 32, respectively) of FIG. 1 according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 7 shows the transmittance [%] as a function of wavelength, λ [nm],for substrates of ion exchangeable Glass C colored using a chromium (Cr)dopant and corresponding IOX colored glass compositions IOX at 450° C.for 2 [h], 410° C. for 32 [h], and 410° C. for 64 [h] (i.e., Samples 21,27, & 33, respectively) of FIG. 1 according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 8 shows the transmittance [%] as a function of wavelength, λ [nm],for substrates of ion exchangeable Glass D colored using a cobalt (Co)dopant and corresponding IOX colored glass compositions IOX at 450° C.for 2 [h], 410° C. for 32 [h], and 410° C. for 64 [h] (i.e., Samples 22,28, & 34, respectively) of FIG. 1 according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 9 shows the transmittance [%] as a function of wavelength, λ [nm],for substrates of ion exchangeable Glass E colored using a copper (Co)dopant and corresponding IOX colored glass compositions IOX at 450° C.for 2 [h], 410° C. for 32 [h], and 410° C. for 64 [h] (i.e., Samples 23,29, & 35, respectively) of FIG. 1 according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 10 shows the transmittance [%] as a function of wavelength, λ [nm],for substrates of ion exchangeable Glass F colored using a gold (Au)dopant and corresponding IOX colored glass compositions IOX at 450° C.for 2 [h], 410° C. for 32 [h], and 410° C. for 64 [h] (i.e., Samples 24,30, & 36, respectively) of FIG. 1 according to aspects of embodimentsand/or embodiments of this disclosure;

FIG. 11 shows the internal absorbance [%] for a 1 mm path length as afunction of wavelength, λ [nm], for substrates of 10× glass compositions(i.e., Samples 37-61 made using ion exchangeable clear Glass G) coloredusing a silver (Ag) dopant by IOX at 410° C. for 8 [h] using a 5 wt %AgNO₃-95 wt % KNO₃ bath according to aspects of embodiments and/orembodiments of this disclosure; and

FIG. 12 shows a detail of the internal absorbance [%] for a 1 mm pathlength as a function of wavelength, λ [nm], of FIG. 11 for substrates of10× glass compositions (i.e., Samples 37-61 made using ion exchangeableclear Glass G) colored using a silver (Ag) dopant by IOX at 410° C. for8 [h] using a 5 wt % AgNO₃-95 wt % KNO₃ bath according to aspects ofembodiments and/or embodiments of this disclosure

DETAILED DESCRIPTION

In the following description of exemplary aspects of embodiments and/orembodiments of this disclosure, reference is made to the accompanyingdrawings that form a part hereof, and in which are shown by way ofillustration specific aspects of embodiments and/or embodiments in whichthis disclosure may be practiced. While these aspects of embodimentsand/or embodiments are described in sufficient detail to enable thoseskilled in the art to practice this disclosure, it will nevertheless beunderstood that no limitation of the scope of this disclosure is therebyintended. Alterations and further modifications of the featuresillustrated herein, and additional applications of the principlesillustrated herein, which would occur to one skilled in the relevant artand having possession of this disclosure, are to be considered withinthe scope of this disclosure. Specifically, other aspects of embodimentsand/or embodiments may be utilized, logical changes (e.g., withoutlimitation, any one or more of chemical, compositional {e.g., withoutlimitation, any one or more of chemicals, materials, . . . and thelike}, electrical, electrochemical, electromechanical, electro-optical,mechanical, optical, physical, physiochemical, . . . and the like) andother changes may be made without departing from the spirit or scope ofthis disclosure. Accordingly, the following description is not to betaken in a limiting sense and the scope of aspects of embodiments and/orembodiments of this disclosure are defined by the appended claims. It isalso understood that terms such as “top,” “bottom,” “outward,” “inward,”. . . and the like are words of convenience and are not to be construedas limiting terms. Also, unless otherwise specified herein, a range ofvalues includes both the upper and lower limits of the range. Forexample, a range of about 1-10 mol % includes the values of 1 mol % and10 mol %.

As noted, various aspects of embodiments and/or embodiments of thisdisclosure relate to an article and/or machine or equipment formed fromand/or including one or more IOX colored glass compositions of thisdisclosure. As one example, an ion exchangeable, colored glasscompositions; ion exchangeable, colorable glass compositions; and/or IOXcolored glass compositions might be used in a variety of electronicdevices or portable computing devices, which might be configured forwireless communication, such as, computers and computer accessories,such as, “mice”, keyboards, monitors (e.g., liquid crystal display(LCD), which might be any of cold cathode fluorescent lights(CCFLs-backlit LCD), light emitting diode (LED-backlit LCD) . . . etc,plasma display panel (PDP) . . . and the like), game controllers,tablets, thumb drives, external drives, whiteboards . . . etc.; personaldigital assistants (PDAs); portable navigation device (PNDs); portableinventory devices (PIDs); entertainment devices and/or centers, devicesand/or center accessories such as, tuners, media players (e.g., record,cassette, disc, solid-state . . . etc.), cable and/or satellitereceivers, keyboards, monitors (e.g., liquid crystal display (LCD),which might be any of cold cathode fluorescent lights (CCFLs-backlitLCD), light emitting diode (LED-backlit LCD) . . . etc, plasma displaypanel (PDP) . . . and the like), game controllers . . . etc.; electronicreader devices or e-readers; mobile or smart phones . . . etc. Asalternative examples, an ion exchangeable, colored glass compositions;ion exchangeable, colorable glass compositions; and/or IOX colored glasscompositions might be used in automotive, appliances, and evenarchitectural applications. To that end, it is desirable that such ionexchangeable, colored glass compositions and ion exchangeable, colorableglass compositions are formulated to have a sufficiently low softeningpoint and a sufficiently low coefficient of thermal expansion so as tobe compatible with to shaping into complex shapes.

As to some aspects relating to compositions, such one or more ionexchangeable colored glass compositions and/or such one or more ionexchangeable, colorable glass compositions and/or such one or more IOXcolored glass compositions included at least about 40 mol % SiO₂. As toother aspects, such one or more ion exchangeable colored glasscompositions and/or such one or more IOX colored glass compositionsinclude one or more metal containing dopants formulated to impart apreselected color (e.g., any one or more of any of preselected hue{e.g., shades of red, orange, yellow, green, blue, and violet},preselected saturation, preselected brightness, and/or preselectedgloss).

As to aspects relating to one or more ion exchangeable colored glasscompositions, such compositions are formulated so that, following an ionexchange treatment (IOX) up to about 64 hours, the color substantiallyretains its original hue without fading or running (e.g., issubstantially color fast). In aspects relating to substantial colorretention, a color difference (ΔE=[{ΔL*}²+{Δa*}²+{Δb*}²]^(0.5)) in theCIELAB color space coordinates of a preselected color of such one ormore ion exchangeable glass compositions after an IOX treatment andbefore the IOX treatment determined from specular transmittancemeasurements using a spectrophotometer include:

-   -   1. up to about 8.2 when measurement results obtained between        about 200 nm-2500 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant A;        or    -   2. up to about 9.1 when measurement results obtained between        about 200 nm-2500 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        F02; or    -   3. up to about 8.4 when measurement results obtained between        about 200 nm-2500 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        D65; or    -   4. up to about 5.2 when measurement results obtained between        about 360 nm-750 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant A;        or    -   5. up to about 6.3 when measurement results obtained between        about 360 nm-750 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        F02; or    -   6. up to about 6.5 when measurement results obtained between        about 360 nm-750 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        D65;

alternatively, a color difference (ΔE=[{ΔL*}²+{Δa*}²+{Δb*}²]^(0.5)) inthe CIELAB color space coordinates of a preselected color of such one ormore ion exchangeable glass compositions after an IOX treatment andbefore the IOX treatment determined from specular transmittancemeasurements using a spectrophotometer include:

-   -   1. up to about 3.5 when measurement results obtained between        about 200 nm-2500 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant A;        or    -   2. up to about 3.6 when measurement results obtained between        about 200 nm-2500 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        F02; or    -   3. up to about 3.3 when measurement results obtained between        about 200 nm-2500 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        D65; or    -   4. up to about 5.2 when measurement results obtained between        about 360 nm-750 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant A;        or    -   5. up to about 6.3 when measurement results obtained between        about 360 nm-750 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        F02; or    -   6. up to about 6.5 when measurement results obtained between        about 360 nm-750 nm are presented in CIELAB color space        coordinates for an observer angle of 10° and a CIE illuminant        D65.

Returning to aspects relating to compositions, such one or more ionexchangeable colored glass compositions and/or such one or more ionexchangeable, colorable glass compositions and/or such one or more IOXcolored glass compositions might include Al₂O₃; at least one alkalimetal oxide of the form R₂O, wherein R comprises one or more of Li, Na,K, Rb, and Cs; and one or more of B₂O₃, K₂O, MgO, ZnO, and P₂O₅. In someother aspects, such one or more ion exchangeable colored glasscompositions and/or such one or more ion exchangeable, colorable glasscompositions and/or such one or more IOX colored glass compositions alsomight include SiO₂ from about 40 mol % to about 70 mol %; Al₂O₃comprises from about 0 mol % to about 25 mol %; B₂O₃ comprises from 0mol % to about 10 mol %; Na₂O comprises from about 5 mol % to about 35mol %; K₂O comprises from 0 mol % to about 2.5 mol %; MgO comprises from0 mol % to about 8.5 mol %; ZnO comprises from 0 mol % to about 2 mol %;P₂O₅ comprises from about 0 to about 10%; CaO comprises from 0 mol % toabout 1.5 mol %; Rb₂O comprises from 0 mol % to about 20 mol %; and Cs₂Ocomprises from 0 mol % to about 20 mol %. It will be appreciated thatone of more sub-ranges of any one or more of the preceding arecontemplated. In further aspects, in such one or more ion exchangeablecolored glass compositions and/or such one or more ion exchangeable,colorable glass compositions and/or such one or more IOX colored glasscompositions a sum of the mol % of R₂O+Al₂O₃+MgO+ZnO might be at leastabout 25 mol %. In still further aspects, such one or more ionexchangeable colored glass compositions and/or such one or more ionexchangeable, colorable glass compositions and/or such one or more IOXcolored glass compositions might include at least one fining agent ofone or more of F, Cl, Br, I, As₂O₃, Sb₂O₃, CeO₂, SnO₂, and combinationsthereof.

In any aspects relating to one or more ion exchangeable colored glasscompositions that substantially maintain their original color followingan IOX; one or more ion exchangeable, colorable glass compositions towhich one or more preselected colors (e.g., any one or more of any ofpreselected hue {e.g., shades of red, orange, yellow, green, blue, andviolet}, preselected saturation, preselected brightness, and/orpreselected gloss) can be imparted by an IOX; one or more IOX coloredglass compositions; and/or one or more processes for making one or moreIOX colored glass compositions. a colorant might include one or moremetal containing dopants in amounts formulated to impart a preselectedcolor (e.g., any one or more of preselected hue {e.g., shades of red,orange, yellow, green, blue, and violet}, preselected saturation,preselected brightness, and/or preselected gloss) to the glass. Such oneor more metal containing dopants include, in some aspects, one or moreof transition metals, one or more of rare earth metals, or one or moreof transition metals and one or more of rare earth metals; in otheraspects, one or more of one or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr,V, Ti, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; instill other aspects, one or more metal containing dopants formulated toimpart a preselected color comprises one or more of Au, Ag, Cu, Ni, Co,Fe, Mn, Cr, and V.

Other aspects of embodiments and/or embodiments of this disclosurerelate to a method of making a colored glass article having at least onesurface under a compressive stress (σ_(s)) and a depth of layer (DOL)and a preselected colored. Such method can include communicating atleast one surface of an aluminosilicate glass article, which has SiO₂ atleast about 40 mol %, and a bath including one or more metal containingdopant sources and in amounts formulated to impart a preselected colorto the aluminosilicate glass article by an ion exchange treatment of thealuminosilicate glass article at a temperature, for example, betweenabout 350° C. and about 500° C. for a sufficient time up to about 64hours to impart the compressive stress (σ_(s)), the depth of layer(DOL), and the preselected color at the at least one surface of thealuminosilicate glass. It will be appreciated, that in some otheraspects, the compressive stress (σ_(s)) might be at least about 500 MPawhile the depth of layer (DOL) might at least about 15 μm. In aspects, abath is formulated using one or more salts including one or morestrengthening ion sources, such for example, a potassium source; the oneor more metal containing dopant sources; and a melting temperature lessthan or equal to the ion exchange treatment temperature. In otheraspects, the one or more metal containing dopants sources comprises oneor more of one or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, V, Ti, La, Ce,Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, alternately, one ormore of one or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, and V. In stillother aspects, the one or more salts might be a formulation of one ormore of a metal halide, cyanide, carbonate, chromate, a nitrogen oxideradical, manganate, molybdate, chlorate, sulfide, sulfite, sulfate,vanadyl, vanadate, tungstate, and combinations of two or more of theproceeding, alternatively, a formulation of one or more of a metalhalide, carbonate, chromate, a nitrate, manganate, sulfide, sulfite,sulfate, vanadyl, vanadate, and combinations of two or more of theproceeding.

Yet other aspects of embodiments and/or embodiments of this disclosurerelate to one or more methods of making one or more colorfast, ionexchangeable glass compositions as disclosed and described herein. Insome aspect, the one or more methods impart the one or more glassarticles with a layer under a compressive stress (σ_(s)) and a depth oflayer (DOL), the layer extending from a surface of the glass articletoward the depth of layer. The one or more methods can involvesubjecting at one surface of an alkali aluminosilicate glass article toan ion exchanging bath at a temperature of up to about 500° C. for up toabout 64 hours, optionally, up to about 16 hours, for a sufficient timeto form the layer. In further aspects, the bath can comprise at least atleast a colorant including one or more metal containing dopantsformulated to impart a preselected color as disclosed and describedherein.

As to other aspects, such one or more ion exchangeable colored glasscompositions and/or such one or more ion exchangeable, colorable glasscompositions are formulated so that, following an ion exchange treatment(IOX), for example, up to about 64 hours, the IOX colored glass has atleast one surface under a compressive stress (σ_(s)) of at least about500 MPa and a depth of layer (DOL) of at least about 15 μm.

In any aspects relating to the one or more glass compositions describedherein (e.g., one or more ion exchangeable colored glass compositionsthat substantially maintain their original color following an IOX; oneor more ion exchangeable, colorable glass compositions to which one ormore preselected colors can be imparted by an IOX; and one or more IOXcolored glass compositions) and/or one or more processes for making oneor more IOX colored glass compositions, an ion exchange treatment (IOX)might be performed at between about 350° C. and 500° C. and/or betweenabout 1 hour and 64 hours.

Also in any aspects relating to the one or more glass compositionsdescribed herein, a glass article having a thickness of up to about 1 mmor more might be made using such compositions.

In any aspects relating to the one or more ion exchangeable coloredglass compositions that substantially maintain their original colorfollowing an IOX, a colorant formulated to impart a preselected color(e.g., any one or more of any of preselected hue {e.g., shades of red,orange, yellow, green, blue, and violet}, preselected saturation,preselected brightness, and/or preselected gloss) to a glass article isadded to a glass composition. A colorant can include one or more metalcontaining dopants in amounts formulated to impart such preselectedcolor. In some aspects, such one or more metal containing dopants caninclude one or more transition metals, one or more rare earth metals, orone or more transition metals and one or more rare earth metals. In someother aspects, such one or more metal containing dopants can include oneor more of one or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, V, Ti, La, Ce,Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; while in still otheraspects, such one or more metal containing dopants can include one ormore of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, and V. It will be appreciatedthat metal containing dopants might be in the form of an element (e.g.,Au, Ag . . . etc.) and/or a compound (e.g., CuO, V₂O₅, Cr₂O₃, CO₃O₄,Fe₂O₃ . . . etc.). Also, such metal containing dopants are added inamounts formulated to impart a preselected color. Such amounts might beup to 5 mol % and more in any combination of dopants that imparts thepreselect color. It will be appreciated that a colorant might be addedas a constituent of a batch of materials formulated for melting to aglass composition; as a constituent of an ion exchange bath formulatedfor imparting color to while at the same time strengthening an ionexchangeable, colorable glass; or both.

In any aspects relating to the one or more ion exchangeable coloredglass compositions, a presence of certain metal containing dopants canimpart color while at the same time enhancing one or more propertiesachieve by an ion exchange treatment. For example, a presence of iron ina glass can impart color while at the same time lead to an increase incompressive stress by increasing stress relaxation times in a mannersimilar to that obtainable to using one or more alkaline earth ions,such as, for example, Mg, Ca . . . etc. As another example, a presenceof vanadium in a glass can impart color while at the same time lead todiffusivity increases in a manner similar to that obtainable to usingphosphorous in a glass composition that, in turn, can result inincreased depths of layers (DOLs).

In any aspects relating to the one or more glass compositions describedherein, including one or more of any of B₂O₃, P₂O₅, Al₂O₃, fluorine . .. and the like in a glass composition can form charged species in anetwork of such composition glass that can interact with Na⁺ in a mannerso as to modify one or more properties of the resultant glass.

In any aspects relating to the one or more glass compositions describedherein, SiO₂ can be the main constituent of a glass composition and, assuch, can constitute a matrix of the glass. Also, SiO₂ can serve as aviscosity enhancer for aiding in a glass's formability while at the sametime imparting chemical durability to the glass. Generally, SiO₂ can bepresent in amounts ranging from about 40 mol % up to about 70 mol %.When SiO₂ exceeds about 70 mol %, a glass's melting temperature can beimpractically high for commercial melting technologies and/or formingtechnologies. In some aspects, SiO₂ might ranging from about 50 mol % upto about 65 mol %, or, alternatively, even from about 50 mol % up toabout 55 mol %.

In any aspects relating to the one or more glass compositions describedherein, such glass compositions might further include Al₂O₃. In someaspects, Al₂O₃ can be present in amounts ranging from about 0 to about25 mol %; alternatively, from about 5 mol % up to about 15 mol %; and,still further, from about 10 mol % to about 20 mol %.

In any aspects relating to the one or more glass compositions describedherein, one or more fluxes can be added to a glass composition inamounts that impart to a glass a melting temperature compatible with acontinuous manufacturing process, such as, for example, a fusiondown-draw formation process, a slot-draw formation process . . . and thelike. One example of a flux includes Na₂O, which when included inappropriate amounts, can decrease not only a glass's melting temperaturebut, also, it's liquidus temperature, both of which can contribute to aglass's ease of manufacturing. Additionally following a glass'sformation, an inclusion of Na₂O can facilitate it's strengthening by ionexchange (10×) treatment. To that end, in some aspect, Na₂O can bepresent in amounts from about 5 mol % to about 35 mol %, while inalternative aspects, from about 15 mol % to about 25 mol %.

In any aspects relating to the one or more glass compositions describedherein, B₂O₃ might be included in sufficient amounts, for example, tolower a glass's softening point. To that end, in some aspects, B₂O₃ canbe present in amounts from about 0 to about 10 mol %; while inalternative aspects, from about 0 to about 5 mol % In some otheraspects, B₂O₃ can be present in amounts from about 1 mol % to about 10mol %; while in still other alternative aspects, from about 1 mol % toabout 5 mol %.

In any aspects relating to the one or more glass compositions describedherein, P₂O₅ might be included in sufficient amounts, for example, toenhance an ion exchangeability of a glass by shorting an amount of timethat might be required to obtain a prespecified level of compressivestress (σ_(s)) at a glass's surface while either not reducing or notsignificantly reducing a corresponding depth of layer (DOL) at theglass's surface. For example for an ion-exchange process performed usinga salt bath having a prescribed formulation at a specified temperature,it has been found that an inclusion of P₂O₅ in a glass's compositionsignificantly shortens the time required to obtain a prespecified levelof compressive stress (σ_(s)) at a glass's surface while notsignificantly reducing a corresponding depth of layer (DOL) at theglass's surface. As a corollary, it has been found for an ion-exchangeprocess performed at a specified temperature for a specified time usinga salt bath having a prescribed formulation, that when comparing a depthof layer (DOL) achieved for a glass composition including P₂O₅ and thatachieved for a corresponding glass composition having no P₂O₅, the DOLachieved for the glass including P₂O₅ is significantly greater than theDOL achieved for the glass including no P₂O₅. To that end, in someaspects relating to the one or more glass compositions described herein,P₂O₅ may be substituted for some or all of any included B₂O₃. In aspectbased on such cases, P₂O₅ can be present in amounts from about 0 mol %to about 10 mol %; alternatively, from about 0 mol % to about 5 mol %.In some other aspects relating to the one or more glass compositionsdescribed herein having no B₂O₃ (i.e., the concentration of B₂O₃ is 0mol %), P₂O₅ can be present in amounts from about 1 mol % to about 10mol %; alternatively, from about 1 mol % to about 5 mol %.

Based on the foregoing, it will be understood that the constituentmaterials of the one or more glass compositions described herein may beformulated in any one or more variety of combinations so as to generateglass compositions having softening points and/or liquid coefficients ofthermal expansion compatible with techniques and/or processes configuredfor forming glass articles having complex shapes. Also, it would bebeneficial that such glass compositions be formulated to be compatiblewith ion exchange strengthening techniques so that relatively highvalues of depth of layer (DOL) and/or compressive stress (σ_(s)) mightbe achieved in at least one surface of an article made using suchcompositions. Some exemplary compositions of such one or more ionexchangeable colored glass compositions; such one or more ionexchangeable, colorable glass compositions; and such one or more IOXcolored glass compositions have been and will be described.

As noted, one or more ion exchangeable colored glass compositions andone or more ion exchangeable, colorable glass compositions of thisdisclosure are formulated so as to be capable of strengthening by anion-exchange technique. For example, in some aspects, glass articlesformed from such exemplary one or more glass compositions describedherein may be strengthened by an ion exchange techniques resulting inone or more IOX colored glass compositions having a compressive stress(σ_(s)) greater than (>) about 625 MPa and a depth of layer (DOL)greater than about 30 μm; alternatively, such compressive stress (σ_(s))may be greater than (>) about 700 MPa. Further, glass articles formedfrom these exemplary glass compositions may be ion-exchange strengthenedsuch that the one or more IOX colored glass compositions having acompressive stress (σ_(s)) equal to or greater than (>) 750 MPa;alternatively, equal to or greater than (>) 800 MPa; or instead, equalto or greater than (>) 850 MPa.

As previously described, articles and/or machines or equipment might beformed from and/or including one or more glass compositions of thisdisclosure or described herein. For example, cover glasses forelectronic devices might be formed using any one of a fusion down-drawprocess, a slot-draw process, or any other suitable process used forforming glass substrates from a batch of glass raw materials. As aspecific example, the one or more ion exchangeable colored glasscompositions and one or more ion exchangeable, colorable glasscompositions disclosure and described herein might be formed into glasssubstrates using a fusion down-draw process. Such fusion down-drawprocess utilizes a drawing tank that has a channel for accepting moltenglass raw material. The channel has weirs that open at the top along thelength of the channel on both sides of the channel. When the channelfills with molten glass, the molten glass overflows the weirs and, dueto gravity, the molten glass flows down the outside surfaces of thedrawing tank as two flowing glass surfaces. These outside surfacesextend downwardly and inwardly while joining at an edge below thedrawing tank. The two flowing glass surfaces join at this edge and fuseto form a single flowing sheet of molten glass that may be further drawnto a desired thickness. The fusion draw method produces glass sheetswith highly uniform, flat surfaces as neither surface of the resultingglass sheet is in contact with any part of the fusion apparatus.

As an alternative specific example, the one or more ion exchangeablecolored glass compositions and one or more ion exchangeable, colorableglass compositions of this disclosure and described herein may be formedusing a slot-draw process that is distinct from the fusion down-drawprocess. In the slot-draw process molten glass is supplied to a drawingtank. The bottom of the drawing tank has an open slot with a nozzle thatextends the length of the slot. The molten glass flows through theslot/nozzle and is drawn downward as a continuous sheet and into anannealing region.

In some aspects relating to the one or more glass compositions describedherein, after a glass substrate is formed, such glass substrate may befurther processed and shaped into one or more complex 3-dimensionalshapes such as, for example, a concave shape, a convex shape, anotherdesired predetermined geometry . . . etc. A formation of the glasssubstrate into a glass article having any of the aforementioned complexshapes is enabled by formulating the one or more ion exchangeablecolored glass compositions and/or one or more ion exchangeable,colorable glass compositions to be characterized by a relatively lowsoftening point and/or a low liquid coefficient of thermal.

As used herein, the term “ion-exchange strengthened” means that a glassis strengthened by one or more ion-exchange processes as might be knownin the art of glass manufacturing. Such ion-exchange processes caninclude, but are not limited to, communicating at least one surface of aglass article and at least one ion source. The glass articles are madeusing the one or more ion exchangeable colored glass compositions and/orone or more ion exchangeable, colorable glass compositions of thisdisclosure. The at least one ion source provides one or more ions havingan ionic radius larger than the ionic radius of one or more ions presentin the glass's at least one surface. In this manner, ions having smallerradii can replace or be exchanged with ions having larger radii in theglass's at least one surface. Communication can be effected at atemperature within a range of temperatures at which ion inter-diffusion(e.g., the mobility of the ions from the at least one ion source intothe glass's surface and ions to replaced from the glass's surface) issufficiently rapid within a reasonable time (e.g., between about 1 hourand 64 hours ranging at between about 300° C. and 500° C.). Also,typically such temperature is below the glass transition temperature(T_(g)) of the glass when it is desired that, as a result of suchcommunication, a compressive stress (σ_(s)) and/or depth of layer (DOL)are attained in the glass's at least one surface. Also, Some examples ofion-exchange include: ions of sodium (Na⁺), potassium (K⁺), rubidium(Rb⁺), and/or cesium (Cs⁺) being exchanged for lithium (Li⁺) ions ofcolored or colorable glass compositions including lithium; ions ofpotassium (K⁺), rubidium (Rb⁺), and/or cesium (Cs⁺) being exchanged forsodium (Na⁺) ions of colored or colorable glass compositions includingsodium; ions of rubidium (Rb⁺) and/or cesium (Cs⁺) being exchanged forpotassium (K⁺) ions of colored or colorable glass compositions includingpotassium . . . etc. Some examples of at least one ion source includeone or more gaseous ion sources, one or more liquid ion sources, and/orone or more solid ion sources. Among one or more liquid ion sources areliquid and liquid solutions, such as, for example molten salts. Forexample for the above ion-exchange examples, such molten salts can beone or more alkali metal salts such as, but not limited to, one or morehalides, carbonates, chlorates, nitrates, sulfites, sulfates, orcombinations of two or more of the proceeding. As a further example forthe above ion-exchange examples, such one or more alkali metal salts caninclude, but not be limited to, a molten salt bath including potassiumnitrate (KNO₃) communicated with the glass's at least one surface. Suchcommunication can be effected at a preselected temperature (e.g.,between about 300° C. and 500° C.) for a preselected time (e.g., betweenabout 1 hour and 64 hours) so as to effected the exchange of potassium(K⁺) ions for any one of lithium (Li⁺) ions and/or sodium (Na⁺) ions inthe glass's at least one surface so as to strengthen it. A preselectedmolten salt bath composition for as well as a preselected temperatureand a preselected time at which communication is to be effected can bevaried depending on the magnitude of compressive stress (σ_(s)) and/ordepth of layer (DOL) one desires to attain in at least one surface ofthe glass's surface.

In some aspects relating to the one or more ion exchangeable, colorableglass compositions described herein, glass articles, such as, forexample, glass substrates and/or shaped glass articles, aresimultaneously strengthened and colored through an ion-exchange process.In such aspects, an at least one ion source, in addition to providingone or more ions having an ionic radius larger than the ionic radius ofone or more ions present in the glass's at least one surface, providescolorant including one or more metal containing dopants formulated toimpart a preselected color to at least a glass's at least one surface.Such one or more metal containing dopants can be selected from one ormore transition metals and/or one or more rare earth metals (e.g., oneor more of one or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, V, Ti, La, Ce,Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, alternatively, oneor more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, and V). In this manner notonly are ions having smaller radii replaced or exchanged with ionshaving larger radii, but also one or more ions preselected for theirability impart the preselected color migrate into glass's at least onesurface. As above, some examples of at least one ion source includingone or more metal containing dopants include one or more gaseous ionsources, one or more liquid ion sources, and/or one or more solid ionsources. Also above, among one or more liquid ion sources are liquid andliquid solutions, such as, for example molten salts. However, examplesof such molten salts, in addition to one or more alkali metal salts,include, in preselected amounts, one or more transition metals saltsand/or one or more rare earth metals metal salts (e.g., Thus, someexamples of such molten salts can include, but not limited to, one ormore halides, cyanides, carbonates, chromates, salts including nitrogenoxide radicals such as nitrates, manganates, molybdates, chlorates,sulfides, sulfites, sulfates, vanadyls, vanadates, tungstates, orcombinations of two or more of the proceeding. Some further examples ofsuch molten salts can include those having on or more ions with largerradii and one or more metal containing dopants disclosed in:

-   [1] G. J. Janz et al., “Molten Salts Data: Diffusion Coefficients in    Single and Multi-Component Salt Systems,” J. Phys. Chem. Ref Data,    Vol. 11, No. 3, pp. 505-693 (1982) at    http://www.nist.gov/data/PDFfiles/jpcrd204.pdf;-   [2] K. H. Stern, “High Temperature Properties and Decomposition of    Inorganic Salts,” J. Phys. Chem. Ref. Data, Vol. 3, No. 2, pp.    48-526 (1974) at http://www.nist.gov/data/PDFfiles/jpcrd51.pdf;-   [3] G. J. Janz et al., “Molten Salts: Volume 1, Electrical    Conductance, Density, and Viscosity Data,” Nat. Stand. Ref. Data    Ser., NBS (US) 15, 139 pages (October 1968) at    http://www.nist.gov/data/nsrds/NSRDS-NBS-15.pdf;-   [4] G. J. Janz et al., “Molten Salts: Volume 2, Section 2, Surface    Tension Data,” Nat. Stand. Ref Data Ser., NBS (U.S.) 28, 62 pages    (August 1969) at http://www.nist.gov/data/nsrds/NSRDS-NBS-28.pdf;-   [5] G. J. Janz et al., “Molten Salts: Volume 3, Nitrates, Nitrites    and Mixtures, Electrical Conductance, Density, Viscosity and Surface    Tension Data,” J. Phys. Chem. Ref. Data, Vol. 1, No. 3, pp.    581-746 (1972) at http://www.nist.gov/data/PDFfiles/jpcrd10.pdf;-   [6] G. J. Janz et al., “Molten Salts: Volume 4, Part 1, Fluorides    and Mixtures, Electrical Conductance, Density, Viscosity and Surface    Tension Data,” J. Phys. Chem. Ref. Data, Vol. 3, No. 1, pp.    1-116 (1974) at http://www.nist.gov/data/PDFfiles/jpcrd41.pdf;-   [7] G. J. Janz et al., “Molten Salts: Volume 4, Part 2, Chlorides    and Mixtures, Electrical Conductance, Density, Viscosity and Surface    Tension Data,” J. Phys. Chem. Ref. Data, Vol. 4, No. 4, pp.    871-1178 (1975) at http://www.nist.gov/data/PDFfiles/jpcrd71.pdf;-   [8] G. J. Janz et al., “Molten Salts: Volume 4, Part 3, Bromides and    Mixtures, Iodides and Mixtures,” J. Phys. Chem. Ref. Data, Vol. 6,    No. 2, pp. 409-596 (1977) at    http://www.nist.gov/data/PDFfiles/jpcrd96.pdf;-   [9] G. J. Janz et al., “Molten Salts: Volume 4, Part 4, Mixed Halide    Melts, Electrical Conductance, Density, Viscosity and Surface    Tension Data,” J. Phys. Chem. Ref. Data, Vol. 8, pp. 125-302 (1979)    at http://www.nist.gov/data/PDFfiles/jpcrd135.pdf;-   [10] G. J. Janz et al., “Molten Salts: Volume 5, Part 1, “Additional    Systems with Common Anions; Electrical Conductance, Density,    Viscosity, and Surface Tension Data,” J. Phys. Chem. Ref. Data. Vol.    9, No. 4, pp. 831-1020 (1980) at    http://www.nist.gov/data/PDFfiles/jpcrd168.pdf;-   [11] G. J. Janz et al., “Molten Salts: Volume 5, Part 2, “Additional    Systems with Common Anions; Electrical Conductance, Density,    Viscosity, and Surface Tension Data,” J. Phys. Chem. Ref. Data. Vol.    12, No. 3, pp. (1983) at    http://www.nist.gov/data/PDFfiles/jpcrd230.pdf;-   [12] G. J. Janz et al., “Physical Properties Data Compilations    Relevant to Energy Storage: I. Molten Salts: Eutectic Data,”    NSRDS•NBS 61, Part I, U.S. Gov't Printing Office, Washington,    D.C. (1978) at http://www.nist.gov/data/nsrds/NSRDS-NBS-61-1.pdf;    and-   [13] G. J. Janz et al., “Physical Properties Data Compilations    Relevant to Energy Storage. II. Molten Salts: Data on Single and    Multi-Component Systems,” NSRDS•NBS 61, Part II, U.S. Gov't Printing    Office, Washington, D.C. (1979) at    http://www.nist.gov/data/nsrds/NSRDS-NBS61-II.pdf,    such as, without limitation, any one of FeCl₂-KCl,    Cs₂Cr₂O₇—Rb₂Cr₂O₇, KCl—NbOCl₃, KCl—K₂Cr₂O₇, FeCl₂-KCl—NdCl₃,    KCl—NbOCl₃, Rb₂O—V₂O₅, CsBr—TiCl, KCl—MnCl₂—NaCl, KCl—MnCl₂,    MnCl₂—RbCl, CsCl—MnCl₂, CoCl₂-KCl, CoCl₂—RbCl, K₂CO₃—K₂Mo4O₁₃,    CuCl₂-KCl, CuSO₄—K₂SO₄, K₂SO₄—MoO₃, AgVO₃—K₂SO₄—KVO₃,    Ag₂SO₄—AgVO₃—K₂SO₄, AgCl—KVO₃, CoCl₂—NaCl . . . etc. Similar to    above, communication can be effected at a temperature within a range    of temperatures at which ion inter-diffusion (e.g., the mobility of    the ions from the at least one ion source into the glass's surface    and ions to replaced from the glass's surface) is sufficiently rapid    within a reasonable time (e.g., between about 1 hour and 64 hours    ranging at between about 300° C. and 500° C.). Also, typically such    temperature is below the glass transition temperature (Tg) of the    glass when it is desired that, as a result of such communication, a    compressive stress (σ_(s)) and/or depth of layer (DOL) are attained    in at least one of the glass's surfaces. A preselected molten salt    bath composition for as well as a preselected temperature and a    preselected time at which communication is to be effected can be    varied depending on the magnitude of compressive stress (σ_(s))    and/or depth of layer (DOL) and/or color one desires to attains in    the glass's at least one surface.

The compositions and properties of the aforementioned one or more glasscompositions described herein (e.g., one or more ion exchangeablecolored glass compositions that substantially maintain their originalcolor following an IOX; one or more ion exchangeable, colorable glasscompositions to which one or more preselected colors can be imparted byan IOX; and one or more IOX colored glass compositions) will be furtherclarified with reference to the following examples.

EXAMPLES Example Glasses A-F

Example glasses A-F described in the following were batched with Si assand, Al as alumina, Na as both soda ash and sodium nitrate, B as boricacid, and P as aluminum metaphosphate. For example glasses A-F, sixdistinct compositions were formulated so that each had a differentcolorant including one or more metal containing dopants formulated toimpart a different preselected color added to the batch with iron (Fe)added as Fe₂O₃, vanadium (V) added as V₂O₅, chromium (Cr) added asCr₂O₃, cobalt (Co) added as Co₃O₄, copper (Cu) added as CuO, and gold(Au) added as Au. The batch materials were melted at 1600° C. for fourhours and then poured and annealed between 550° C. and 650° C. Thecompositions of example glasses A-F were analyzed by inductively coupledplasma and/or atomic absorption and/or X-ray fluorescence (XRF)techniques to determine the mol % of the constituent materials in each.The specific compositions for each of example glasses A-F are reportedin Table I.

TABLE I Glass Composition in Mole Percent [Mol %] Example Glass A B C DE F Al₂O₃ 8.28 8.52 8.40 8.51 8.48 8.48 Au 0.00 0.00 0.00 0.00 0.00 0.01CaO 0.51 0.48 0.51 0.48 0.48 0.48 Cl 0.00 0.01 0.01 0.00 0.00 0.01 Co₃O₄0.00 0.00 0.00 0.10 0.00 0.00 Cr₂O₃ 0.00 0.00 0.27 0.00 0.00 0.00 CuO0.00 0.00 0.00 0.00 0.90 0.00 Fe₂O₃ 0.70 0.01 0.01 0.01 0.01 0.01 K₂O1.04 1.13 1.12 1.11 1.12 1.10 MgO 9.27 6.42 7.12 6.73 6.31 6.53 Na₂O13.69 13.64 14.19 13.81 13.55 13.78 P₂O₅ 0.00 0.00 0.00 0.00 0.00 0.00SO₃ 0.00 0.00 0.00 0.01 0.00 0.01 SiO₂ 66.34 68.85 68.18 69.04 68.9669.40 SnO₂ 0.15 0.16 0.17 0.17 0.16 0.18 TiO₂ 0.00 0.01 0.01 0.00 0.010.01 V₂O₅ 0.00 0.75 0.00 0.00 0.00 0.00 ZnO 0.00 0.00 0.01 0.01 0.000.00 Total 100.00 100.00 100.00 100.00 100.00 100.00

Also each of example glasses A-F had been imparted with color by thebatched the one or more metal containing dopants—namely: glass A havingan iron (FE) dopant was an olive green; glass B having an vanadium (V)dopant was a yellow; glass C having an chromium (Cr) dopant was a green;glass D having a cobalt (Co) dopant was a dark blue; glass E having acopper (Cu) dopant was a patina green; and glass F having a gold (Au)dopant was a red. Substrates of each of example glasses A-F were prepareso as to have an as-made substrate for comparison and a suitable numberof substrates available for treatment by ion-exchange under a variety ofconditions. Photographs (which have been converted from color toblack-gray-white) of each of example glasses A-F are presented in FIG. 1in the column having the “As-Made” heading.

Samples 1-18

For each of example glasses A-F, as-made substrates of each werecommunicated a KNO₃ salt bath at a temperature of about 410° C. for 2[h] hours, 4 [h], and 8 [h] thereby producing Samples 1-18.

As noted above, a replacement of smaller ions with larger ions creates acompressive stress (σ_(s)) at a glass's surface and/or a surface layerthat is under compression, or a compressive stress (CS). Such surfacelayer extends from the glass's surface into its interior or bulk to acorresponding depth of layer (DOL). The compressive stress (CS) in suchsurface layer is balanced by a tensile stress, or central tension (CT)in the glass's interior or inner region.

Compressive stress (σ_(s)), compressive stress (CS), and correspondingdepth of layer (DOL) can be conveniently be measured, withoutlimitation, using conventional optical techniques and instrumentationsuch as commercially available surface stress meter models FSM-30,FSM-60, FSM-6000LE, FSM-7000H . . . etc. available from Luceo Co., Ltd.and/or Orihara Industrial Co., Ltd., both in Tokyo, Japan (see e.g.,FSM-30 Surface Stress Meter Brochure, Cat no. FS-0013E athttp://www.orihara-ss.co.jp/catalog/fsm/fsm-30-Ecat.pdf; FSM-60 SurfaceStress Meter Brochure, Cat no. FS-0013E athttp://www.luceo.co.jp/english/pdf/FSM-60LE%20Ecat.pdf; FSM-6000LESurface Stress Meter Brochure, Revision 2009.04 athttp://www.luceo.co.jp/english/pdf/FSM-6000LE%20Ecat.pdf; FSM-7000HSurface Stress Meter Brochure, Cat no. FS-0024 2009.08 athttp://www.luceo.co.jp/catalog/catalog-pdf/FFSM-7000H_cat.pdf; T.Kishii, “Surface Stress Meters Utilizing the Optical Waveguide Effect ofChemically Tempered Glasses,” Optics & Lasers in Engineering 4 (1983)pp. 25-38 at http://www.orihara-ss.co.jp/data/literature01/A034.pdf; andK. Kobayashi et al., “Chemical Strengthening of Glass and IndustrialApplication,” [52 (1977)], pp. 109-112 athttp://www.orihara-ss.co.jp/data/literature01/A001.pdf, all of which areincorporated by reference herein). Such conventional optical techniquesand instrumentation involve methods of measuring compressive stress anddepth of layer as described in ASTM 1422C-99, entitled “StandardSpecification for Chemically Strengthened Flat Glass,” and ASTM1279.19779 “Standard Test Method for Non-Destructive PhotoelasticMeasurement of Edge and Surface Stresses in Annealed, Heat-Strengthened,and Fully-Tempered Flat Glass,” the contents of which are incorporatedherein by reference in their entirety. Surface stress measurements relyupon the accurate measurement of the stress optical coefficient (SOC),which is related to the stress-induced birefringence of the glass. SOCin turn is measured by those methods that are known in the art, such asfiber and four point bend method, both of which are described in ASTMstandard C770-98 (2008), entitled “Standard Test Method for Measurementof Glass Stress-Optical Coefficient,” the contents of which areincorporated herein by reference in their entirety, and a bulk cylindermethod.

Compressive stress (σ_(s)) and a corresponding depth of layer (DOL) foreach of Samples 1-18 were determined using the above conventionaloptical techniques and instrumentation. Values for the depth of layer(DOL) in micrometers [μm] and values for the compressive stress (σ_(s))in megapascal [MPa] are reported for each of the Samples 1-18 in TablesII-IV, where Table II includes the results for Samples 1-6, IOX for 2[h] at 410° C.; Table III includes the results for Samples 7-12, IOX for4 [h] at 410° C.; and Table IV includes the results for Samples 7-12,IOX for 8 [h] at 410° C.

TABLE II IOX 2 [h] at 410° C. Sample 1 2 2 4 5 6 σs avg 882.8 838.2866.8 856.2 844.9 844.0 st dev σs 5.1 3.2 9.8 1.8 1.5 5.3 DOL avg 15.620.9 19.1 18.9 17.6 20.0 st dev DOL 0.2 0.5 0.4 0.0 0.0 0.2

TABLE III IOX 4 [h] at 410° C. Sample 7 8 9 10 11 12 σs avg 883.9 837.6874.9 852.8 842.9 855.0 st dev σs 6.0 3.6 6.8 3.8 1.9 2.4 DOL avg 22.429.4 25.5 25.0 24.5 27.0 st dev DOL 0.2 0.2 0.8 0.3 0.0 0.1

TABLE IV IOX 8 [h] at 410° C. Sample 13 14 15 16 17 18 σs avg 858.2809.6 850.1 832.1 819.1 827.7 st dev σs 7.3 4.0 5.9 2.6 3.3 1.6 DOL avg30.8 40.6 37.4 35.0 34.1 37.6 st dev DOL 1.6 0.8 0.7 0.6 0.0 0.9

FIG. 2 graphically depicts the compressive stress (σ_(s)) in MPa as afunction of ion exchange treatment (IOX) time (t [h]) in a KNO₃ bath at410° C. for substrates of IOX colored glass compositions (i.e., Samples1-18) and made using the different dopants. It can be seen from FIG. 2that the σ_(s) achieved, regardless of the IOX time and type ofcolorant, ranges from about 810 MPa to greater than 880 MPa. Furtherreview of FIG. 2 reveals that those substrates including iron (Fe) inthe colorant achieved the highest σ_(s), while those including Vanadium(V) exhibited the lowest σ_(s) values, regardless of the particular IOXtime. In particular, σ_(s) values of Fe dopant substrates were between880 and 890 MPa for 2 [h] and 4 [h] treatments, and approximately 855MPa for the 8 [h] treatment, while the σ_(s) values of V dopantsubstrates exhibited were between 830 and 840 MPa for 2 [h] and 4 [h]treatments, and approximately 810 MPa for the 8 [h] treatments.

FIG. 3 graphically depicts the depth of layer (DOL) in μm as a functionof ion exchange treatment (IOX) time (t [h]) in a KNO₃ bath at 410° C.for substrates of IOX colored glass compositions (i.e., Samples 1-18)and made using the different dopants. It can be seen from FIG. 3 thatthe DOL achieved, regardless of the IOX time and type of colorant,ranges from about 15 μm to approximately 40 μm. In contrast to the σ_(s)values, substrates including iron (Fe) in the colorant achieved thelowest DOL values while those including Vanadium (V) exhibited thehighest DOL values, regardless of the particular IOX time. Inparticular, the DOL values of Fe dopant substrates ranged between 15 to30 μm the three IOX times at 410° C., while the DOL values of V dopantsubstrates ranged between 20 and 40 μm for the three IOX times at 410°C.

FIG. 4 graphically depicts the transmittance [%] as a function ofwavelengths, λ [nm], from 200 nanometers [nm] to 2500 nm for the varietyof samples of IOX colored glass compositions (i.e., Samples 1-6) basedon substrates of example glasses A-F subjected to 10× using a KNO₃ bathat 410° C. for 2 [h]. Transmittance spectra of FIG. 4 for Samples 1-6were obtained using the commercially available a Hitachi U4001spectrophotometer equipped with 60 mm diameter integrating sphere. TheHitachi U4001 spectrophotometer was configured with followingmeasurement parameters: in the range of λ [nm] from 200-800, thesettings were Scan Speed: 120 nm/min and Bandwidth-PMT-3.0 nm and, witha detector change at 800 nm, in the range of λ [nm] from 800-2500, thesettings were Scan Speed: 300 nm/min and Bandwidth-PbS-Servo, Gain-4while in the range of λ [nm] from 200-340, the source was deuteriumbased and, with a source change at 340 nm, in the range of λ [nm] from340-2500, the source was tungsten halogen based. No aperture was usedover the entire range of λ [nm] from 200-2500 nm. The surfaces of eachsample was polished to an optical finish. Prior to measurement, theflats of each sample were cleaned using a first low linting wipersaturated with a solution of 1% micro soap concentrate in deionized (DI)water; rinsed using DI water; dried using a second linting wiper; andfinally wiped using a third wiper dampened with HPLC grade reagentalcohol.

Samples 19-36

For each of example glasses A-F, as-made substrates of each werecommunicated a KNO₃ salt bath at a temperature of about 450° C. for 2[h] hours and a KNO₃ salt bath at a temperature of about 410° C. for 32[h], and 64 [h] thereby producing Samples 19-36.

Returning to FIG. 1 shows a matrix of photographs (which have beenconverted from color to black-gray-white) illustrating a retention oforiginal hue without fading or running (e.g., colorfastness) of ionexchangeable colored glass compositions and IOX colored glasscompositions. Photographs (which have been converted from color toblack-gray-white) of each of example glasses A-F are presented in FIG. 1in the column having the “As-Made” heading and compared to photographsof samples of these glasses following IOX in KNO₃ at 450° C. for 2 [h];IOX in KNO₃ at 410° C. for 32 [h]; and IOX in KNO₃ at 410° C. for 64[h]. Even without color, the photographs in FIG. 1 demonstrate retentionof original or “as-made” hue without fading and/or running (e.g.,colorfastness). To quantify such “as-made” hue retention, thetransmittance [%] as a function of wavelength, λ [nm], for exampleglasses A-F and Samples 19-36 where measured and compared. FIGS. 5-10graphically depict the transmittance [%] as a function of wavelength, λ[nm], for substrates of: ion exchangeable Glass A colored using an iron(Fe) dopant and corresponding IOX colored glass compositions (i.e.,Samples 19, 25, & 31); ion exchangeable Glass B colored using a vanadium(V) dopant and corresponding IOX colored glass compositions (i.e.,Samples 20, 26, & 32); ion exchangeable Glass C colored using a chromium(Cr) dopant and corresponding IOX colored glass (i.e., Samples 21, 27, &33); ion exchangeable Glass D colored using a cobalt (Co) dopant andcorresponding IOX colored glass compositions (i.e., Samples 22, 28, &34); ion exchangeable Glass E colored using a copper (Co) dopant andcorresponding IOX colored glass compositions (i.e., Samples 23, 29, &35); and ion exchangeable Glass E colored using a gold (Au) dopant andcorresponding IOX colored glass compositions (i.e., Samples 24, 30, &36). These transmittance spectra were obtained using the Hitachi U4001spectrophotometer equipped with 60 mm diameter integrating sphere in themanner described above. It can be seen from FIGS. 5-10 that thetransmission spectra for each as-made glass composition and itscorresponding IOX colored samples are similarly shaped confirmingdemonstrating the visual observation of original or “as-made” hueretention. Also it can be seen that the spectra substantially coincidein the range of λ [nm] from about 250-500 for Fe dopant and V dopantcompositions: in the range of λ [nm] from about 250-800 for Co dopantand Cu dopants compositions while appearing to slightly diverge for Crdopant and Au dopants compositions in the range of λ [nm] from about250-500.

The transmittance [%] as a function of wavelength, λ [nm] data of FIGS.5-10 were transformed into L*; a*; and b* CIELAB color space coordinatesby means of an analytical software (e.g., UV/VIS/NIR application pack ofthe GRAMS spectroscopy software suite commercially available from ThermoScientific West Palm Beach, Fla., US) for CIE Illuminant D65 and a 10°Observer, as presented in Table V; for CIE Illuminant F02 and a 10°Observer, as presented in Table VI; and for CIE Illuminant A and a 10°Observer, as presented in Table VII. In addition, a color difference:

ΔE=[{ΔL*} ² +{Δa*} ² +{Δb*} ²]^(0.5)

was determined using the L*; a*; and b* CIELAB color space coordinatesobtained for the as-made colored glass before IOX treatment and the IOXcolored glasses after treatment for each CIE Illuminant-Observercombination and are also summarized in the Tables V-VII.

TABLE V Hitachi U4001 Sample Thickness: 1 [mm] Scan Range: 200-2500 [nm]CIE Illuminant D65 - 10° Observer Sample Condition L* a* b* ΔE A GlassA - As Made 84.83 −8.09 2.56 NA B Glass B - As Made 89.24 −1.64 13.67 NAC Glass C - As Made 76.69 −18.78 33.96 NA D Glass D - As Made 42.2427.14 −67.02 NA E Glass E - As Made 90.40 −10.21 −5.07 NA F Glass F - AsMade 62.24 42.75 12.90 NA 19 Glass A - 2 [h] at 450° C. 83.84 −8.10 2.651.00 20 Glass B - 2 [h] at 450° C. 88.47 −1.65 14.31 1.00 21 Glass C - 2[h] at 450° C. 75.02 −18.83 34.08 1.67 22 Glass D - 2 [h] at 450° C.39.87 30.92 −69.53 5.12 23 Glass E - 2 [h] at 450° C. 90.27 −9.93 −4.710.48 24 Glass F - 2 [h] at 450° C. 63.05 39.77 20.72 8.41 25 Glass A -32 [h] at 410° C. 84.89 −7.61 1.62 1.06 26 Glass B - 32 [h] at 410° C.88.79 −1.71 14.15 0.66 27 Glass C - 32 [h] at 410° C. 75.65 −18.39 33.201.34 28 Glass D - 32 [h] at 410° C. 41.55 28.05 −67.69 1.32 29 Glass E -32 [h] at 410° C. 90.31 −10.11 −5.02 0.15 30 Glass F - 32 [h] at 410° C.62.76 41.63 12.83 1.23 31 Glass A - 64 [h] at 410° C. 83.76 −8.42 2.221.17 32 Glass B - 64 [h] at 410° C. 88.79 −1.71 14.18 0.68 33 Glass C -64 [h] at 410° C. 75.19 −18.57 34.53 1.62 34 Glass D - 64 [h] at 410° C.42.48 26.51 −66.72 0.74 35 Glass E - 64 [h] at 410° C. 90.27 −10.10−5.04 0.18 36 Glass F - 64 [h] at 410° C. 61.63 42.12 16.12 3.34 Minimum39.87 −18.83 −69.53 0.15 Maximum 90.40 42.75 34.53 8.41

For CIE Illuminant D65 and a 10° Observer, color difference, ΔE, rangesfrom about 0.15 to about 8.41 with the largest value being associatedwith Sample 24, a Au dopant substrates treated for 2 [h] at 450° C.while the smallest value is associated with Sample 29, a Cu dopantsubstrate treated for 32 [h] at 410° C.

TABLE VI Hitachi U4001 Sample Thickness: 1 [mm] Scan Range: 200-2500[nm] CIE Illuminant F02 - 10° Observer Sample Condition L* a* b* ΔE AGlass A - As Made 84.71 −5.51 2.93 NA B Glass B - As Made 89.89 −1.4115.45 NA C Glass C - As Made 78.25 −15.37 37.61 NA D Glass D - As Made39.10 17.12 −75.71 NA E Glass E - As Made 89.72 −7.16 −6.09 NA F GlassF - As Made 65.40 30.51 17.76 NA 19 Glass A - 2 [h] at 450° C. 83.73−5.52 3.04 0.99 20 Glass B - 2 [h] at 450° C. 89.14 −1.43 16.17 1.04 21Glass C - 2 [h] at 450° C. 76.53 −15.37 37.64 1.72 22 Glass D - 2 [h] at450° C. 36.59 20.54 −78.60 5.13 23 Glass E - 2 [h] at 450° C. 89.62−6.97 −5.66 0.48 24 Glass F - 2 [h] at 450° C. 66.62 27.52 26.27 9.10 25Glass A - 32 [h] at 410° C. 84.74 −5.18 1.86 1.12 26 Glass B - 32 [h] at410° C. 89.46 −1.46 16.00 0.70 27 Glass C - 32 [h] at 410° C. 77.12−14.99 36.67 1.52 28 Glass D - 32 [h] at 410° C. 38.38 17.97 −76.46 1.3529 Glass E - 32 [h] at 410° C. 89.62 −7.10 −6.03 0.13 30 Glass F - 32[h] at 410° C. 65.88 29.69 17.64 0.96 31 Glass A - 64 [h] at 410° C.83.61 −5.74 2.53 1.20 32 Glass B - 64 [h] at 410° C. 89.45 −1.46 16.030.72 33 Glass C - 64 [h] at 410° C. 76.79 −15.24 38.23 1.59 34 Glass D -64 [h] at 410° C. 39.33 16.68 −75.37 0.60 35 Glass E - 64 [h] at 410° C.89.59 −7.09 −6.06 0.16 36 Glass F - 64 [h] at 410° C. 64.97 29.62 21.273.64 Minimum 36.59 −15.37 −78.60 0.13 Maximum 89.89 30.51 38.23 9.10

For CIE Illuminant F02 and a 10° Observer, color difference, ΔE, rangesfrom about 0.13 to about 9.1 with the largest value being associatedwith Sample 24, a Au dopant substrates treated for 2 [h] at 450° C.while the smallest value is associated with Sample 29, a Cu dopantsubstrate treated for 32 [h] at 410° C.

TABLE VII Hitachi U4001 Sample Thickness: 1 [mm] Scan Range: 200-2500[nm] CIE Illuminant A - 10° Observer Sample Condition L* a* b* ΔE AGlass A - As Made 84.07 −8.04 0.55 NA B Glass B - As Made 89.96 1.3013.78 NA C Glass C - As Made 76.61 −16.72 32.70 NA D Glass D - As Made36.63 −9.41 −72.01 NA E Glass E - As Made 88.84 −12.28 −7.98 NA F GlassF - As Made 68.17 40.24 24.23 NA 19 Glass A - 2 [h] at 450° C. 83.08−8.02 0.64 0.99 20 Glass B - 2 [h] at 450° C. 89.22 1.40 14.44 0.99 21Glass C - 2 [h] at 450° C. 74.93 −16.55 32.68 1.68 22 Glass D - 2 [h] at450° C. 34.04 −7.44 −74.74 4.25 23 Glass E - 2 [h] at 450° C. 88.77−11.88 −7.52 0.61 24 Glass F - 2 [h] at 450° C. 68.99 37.80 31.96 8.1525 Glass A - 32 [h] at 410° C. 84.12 −7.76 −0.32 0.92 26 Glass B - 32[h] at 410° C. 89.54 1.32 14.27 0.65 27 Glass C - 32 [h] at 410° C.75.57 −16.11 31.84 1.48 28 Glass D - 32 [h] at 410° C. 35.87 −9.03−72.77 1.15 29 Glass E - 32 [h] at 410° C. 88.76 −12.15 −7.89 0.18 30Glass F - 32 [h] at 410° C. 68.55 39.31 23.88 1.06 31 Glass A - 64 [h]at 410° C. 82.93 −8.47 0.11 1.29 32 Glass B - 64 [h] at 410° C. 89.531.33 14.29 0.67 33 Glass C - 64 [h] at 410° C. 75.14 −16.52 33.31 1.6034 Glass D - 64 [h] at 410° C. 36.85 −9.81 −71.80 0.51 35 Glass E - 64[h] at 410° C. 88.73 −12.14 −7.92 0.20 36 Glass F - 64 [h] at 410° C.67.64 39.68 27.62 3.47 Minimum 34.04 −16.72 −74.74 0.18 Maximum 89.9640.24 33.31 8.15

For CIE Illuminant D65 and a 10° Observer, color difference, ΔE, rangesfrom about 0.15 to about 8.41 with the largest value being associatedwith Sample 24, a Au dopant substrates treated for 2 [h] at 450° C.while the smallest value is associated with Sample 29, a Cu dopantsubstrate treated for 32 [h] at 410° C.

A second series of transmittance color measurements were made using aHunterlab Ultrascan XE colorimeter configured with following measurementparameters: in the range of λ [nm] from 360-750, Spectral Bandwidth of10 nm, Scan Steps of 10 nm, xenon flash lamp type source, diode arraydetector, and a ¾″ diameter aperture. Sample preparation prior to makingmeasurements was substantially as described above. Again, spectra foreach sample were transformed into L*; a*; and b* CIELAB color spacecoordinates for CIE Illuminant D65 and a 10° Observer, as presented inTable VIII; for CIE Illuminant F02 and a 10° Observer, as presented inTable IX; and for CIE Illuminant A and a 10° Observer, as presented inTable X. Also, color difference: ΔE=[{ΔL*}²+{Δa*}²+{Δb*}²]^(0.5) foreach CIE Illuminant-Observer combination was determined. In addition,spectra for each of example glasses A-F were measured several times toestablish measurement precision for colored glasses.

For CIE Illuminant D65 and a 10° Observer, color difference, ΔE, rangesfrom about 0.07 to about 6.5; however, ΔE of the measurement precisionranges from about 0.08 to about 0.21 suggesting that ΔE ranges fromabout 0.21 to about 6.5. Thus, the largest ΔE value is associated withSample 34, a Co dopant substrates treated for 64 [h] at 410° C. whilethe smallest value is 0.26 associated with Sample 23, a Cu dopantsubstrate treated for 2 [h] at 410° C.

For CIE Illuminant F02 and a 10° Observer, color difference, ΔE, rangesfrom about 0.07 to about 6.33; however, ΔE of the measurement precisionranges from about 0.08 to about 0.21 suggesting that ΔE ranges fromabout 0.21 to about 6.33. Thus, the largest ΔE value is associated withSample 34, a Co dopant substrates treated for 64 [h] at 410° C. whilethe smallest value is 0.29 associated with Sample 23, a Cu dopantsubstrate treated for 2 [h] at 410° C.

For CIE Illuminant A and a 10° Observer, color difference, ΔE, rangesfrom about 0.09 to about 5.2; however, ΔE of the measurement precisionranges from about 0.08 to about 0.17 suggesting that ΔE ranges fromabout 0.17 to about 5.2. Thus, the largest ΔE value is associated withSample 34, a Co dopant substrates treated for 64 [h] at 410° C. whilethe smallest value is 0.17 associated with Sample 35, a Cu dopantsubstrate treated for 64 [h] at 410° C.

TABLE VIII Hunterlab Ultrascan XE Sample Thickness: 1 [mm] Scan Range:360-750 [nm] CIE Illuminant D65 - 10° Observer Sample Condition L* a* b*ΔE A Glass A - As Made 85.23 −7.68  1.30 NA B Glass B - As Made 89.17−1.77 13.70 NA C Glass C - As Made 76.02 −19.65  33.34 NA D Glass D - AsMade - 1^(st) 39.19 31.85 −70.06  NA ″ Glass D - As Made - 2^(nd)Measurement 39.12 31.97 −70.15  0.17 ″ Glass D - As Made - 3^(rd)Measurement 39.24 31.83 −70.08  0.20 ″ Glass D - As Made - 4^(th)Measurement 39.16 31.85 −70.06  0.08 ″ Glass D - As Made - 5^(th)Measurement 39.15 32.01 −70.20  0.21 ″ Minimum 39.12 31.83 −70.20  0.08″ Maximum 39.24 32.01 −70.06  0.21 E Glass E - As Made 90.18 −10.34 −5.24 NA F Glass F - As Made 63.71 41.05 17.21 NA 19 Glass A - 2 [h] at450° C. 84.00 −8.45  2.46 1.86 20 Glass B - 2 [h] at 450° C. 88.56 −1.8014.40 0.93 21 Glass C - 2 [h] at 450° C. 75.09 −19.84  33.44 0.95 22Glass D - 2 [h] at 450° C. 39.43 31.41 −69.85  0.54 23 Glass E - 2 [h]at 450° C. 90.10 −10.24  −5.01 0.26 24 Glass F - 2 [h] at 450° C. 63.7939.26 22.17 5.27 25 Glass A - 32 [h] at 410° C. 84.89 −7.69  1.23 0.3526 Glass B - 32 [h] at 410° C. 88.90 −1.84 14.23 0.60 27 Glass C - 32[h] at 410° C. 41.12 28.58 −68.13  4.26 28 Glass D - 32 [h] at 410° C.75.53 −19.27  32.54 1.01 29 Glass E - 32 [h] at 410° C. 90.17 −10.37 −5.30 0.07 30 Glass F - 32 [h] at 410° C. 63.67 41.07 13.83 3.38 31Glass A - 64 [h] at 410° C. 83.72 −8.70  2.10 1.99 32 Glass B - 64 [h]at 410° C. 88.88 −1.85 14.25 0.63 33 Glass C - 64 [h] at 410° C. 74.94−19.43  33.67 1.15 34 Glass D - 64 [h] at 410° C. 42.11 26.88 −67.06 6.50 35 Glass E - 64 [h] at 410° C. 90.09 −10.39  −5.32 0.13 36 GlassF - 64 [h] at 410° C. 62.14 42.04 17.30 1.86 Minimum 39.19 −19.84 −70.06  0.07 Maximum 90.18 42.04 33.67 6.50

TABLE IX Hunterlab Ultrascan XE Sample Thickness: 1 [mm] Scan Range:360-750 [nm] CIE Illuminate F02 - 10° Observer Sample Condition L* a* b*ΔE A Glass A - As Made 85.06 −5.24  1.53 NA B Glass B - As Made 89.80−1.53 15.50 NA C Glass C - As Made 77.42 −16.11  36.69 NA D Glass D - AsMade - 1^(st) 35.79 21.90 −79.56  NA ″ Glass D - As Made - 2^(nd)Measurement 35.72 22.01 −79.66  0.16 ″ Glass D - As Made - 3^(rd)Measurement 35.84 21.88 −79.59  0.19 ″ Glass D - As Made - 4^(th)Measurement 35.77 21.91 −79.56  0.08 ″ Glass D - As Made - 5^(th)Measurement 35.75 22.04 −79.73  0.21 ″ Minimum 35.72 21.88 −79.73  0.08″ Maximum 35.84 22.04 −79.56  0.21 E Glass E - As Made 89.48 −7.23 −6.28NA F Glass F - As Made 67.27 28.45 22.67 NA 19 Glass A - 2 [h] at 450°C. 83.87 −5.77  2.84 1.85 20 Glass B - 2 [h] at 450° C. 89.22 −1.5816.29 0.98 21 Glass C - 2 [h] at 450° C. 76.44 −16.22  36.73 0.99 22Glass D - 2 [h] at 450° C. 36.03 21.55 −79.32  0.49 23 Glass E - 2 [h]at 450° C. 89.41 −7.16 −6.01 0.29 24 Glass F - 2 [h] at 450° C. 67.4526.91 27.85 5.41 25 Glass A - 32 [h] at 410° C. 84.72 −5.24  1.46 0.3526 Glass B - 32 [h] at 410° C. 89.56 −1.60 16.10 0.65 27 Glass C - 32[h] at 410° C. 37.81 18.99 −77.34  4.18 28 Glass D - 32 [h] at 410° C.76.85 −15.74  35.74 1.17 29 Glass E - 32 [h] at 410° C. 89.45 −7.26−6.34 0.07 30 Glass F - 32 [h] at 410° C. 66.88 29.06 18.78 3.96 31Glass A - 64 [h] at 410° C. 83.56 −5.95  2.43 1.89 32 Glass B - 64 [h]at 410° C. 89.54 −1.61 16.13 0.69 33 Glass C - 64 [h] at 410° C. 76.38−15.96  37.05 1.11 34 Glass D - 64 [h] at 410° C. 38.83 17.54 −76.12 6.33 35 Glass E - 64 [h] at 410° C. 89.37 −7.27 −6.38 0.15 36 Glass F -64 [h] at 410° C. 65.61 29.35 22.61 1.89 Minimum 35.79 −16.22  −79.56 0.07 Maximum 89.80 29.35 37.05 6.33

TABLE IX Hunterlab Ultrascan XE Sample Thickness: 1 [mm] Scan Range:360-750 [nm] CIE Illuminant A - 10° Observer Sample Condition L* a* b*ΔE A Glass A - As Made 84.42 −7.93 −0.67 NA B Glass B - As Made 89.88 1.22 13.77 NA C Glass C - As Made 75.82 −17.43  31.84 NA D Glass D - AsMade - 1^(st) 33.31 −6.52 −75.28  NA ″ Glass D - As Made - 2^(nd)Measurement 33.25 −6.45 −75.37  0.13 ″ Glass D - As Made - 3^(rd)Measurement 33.36 −6.55 −75.31  0.16 ″ Glass D - As Made - 4^(th)Measurement 33.29 −6.52 −75.28  0.08 ″ Glass D - As Made - 5^(th)Measurement 33.27 −6.45 −75.43  0.17 ″ Minimum 33.25 −6.55 −75.43  0.08″ Maximum 33.36 −6.45 −75.28  0.17 E Glass E - As Made 88.60 −12.43 −8.19 NA F Glass F - As Made 69.64 38.47 28.59 NA 19 Glass A - 2 [h] at450° C. 83.19 −8.43  0.35 1.67 20 Glass B - 2 [h] at 450° C. 89.30  1.3114.48 0.92 21 Glass C - 2 [h] at 450° C. 74.87 −17.43  31.80 0.95 22Glass D - 2 [h] at 450° C. 33.56 −6.77 −75.08  0.41 23 Glass E - 2 [h]at 450° C. 88.54 −12.25  −7.92 0.33 24 Glass F - 2 [h] at 450° C. 69.7337.31 33.39 4.94 25 Glass A - 32 [h] at 410° C. 84.08 −7.94 −0.75 0.3526 Glass B - 32 [h] at 410° C. 89.64  1.24 14.30 0.58 27 Glass C - 32[h] at 410° C. 35.38 −8.41 −73.27  3.45 28 Glass D - 32 [h] at 410° C.75.33 −16.88  30.97 1.14 29 Glass E - 32 [h] at 410° C. 88.57 −12.47 −8.26 0.09 30 Glass F - 32 [h] at 410° C. 69.44 38.73 24.83 3.77 31Glass A - 64 [h] at 410° C. 82.86 −8.80 −0.09 1.88 32 Glass B - 64 [h]at 410° C. 89.61  1.23 14.32 0.61 33 Glass C - 64 [h] at 410° C. 74.77−17.21  32.21 1.13 34 Glass D - 64 [h] at 410° C. 36.44 −9.29 −72.19 5.20 35 Glass E - 64 [h] at 410° C. 88.49 −12.49  −8.30 0.17 36 GlassF - 64 [h] at 410° C. 68.20 39.53 28.89 1.81 Minimum 33.31 −17.43 −75.28  0.09 Maximum 89.88 39.53 33.39 5.20

Example Glass G

For Example glass G described in the following, 25 distinct batches wereprepared with Si as sand, Al as alumina, Na as both soda ash and sodiumnitrate, B as boric acid, and P as aluminum metaphosphate. Each of the25 distinct batches of example glass G was formulated without metalcontaining dopants. Each of the 25 distinct batches was melted at 1600°C. for four hours and then poured and annealed between 550° C. and 650°C. The composition each example glass G corresponding one of the 25distinct batches was analyzed by inductively coupled plasma and/oratomic absorption and/or X-ray fluorescence (XRF) techniques todetermine the mol % of the constituent materials in each. The range ofcompositions of example glass G is reported in Table XI.

TABLE XI Example Glass G Composition in Mole Percent [Mol %] SiO₂ Al₂O₃Na₂O K₂O MgO CaO SnO₂ ZrO₂ Fe₂O₃ Range 68.0 7.0 12.0 0.1 5.0 0.0 0.1 0.00.0 71.0 9.5 15.0 2.0 7.4 1.0 0.2 0.0 0.0

Samples 37-61

For each bath of example glass G, as-made substrates were communicatedwith a 5 wt % AgNO₃-95 wt % KNO₃ bath at a temperature of about 410° C.for 8 [h] thereby producing Samples 37-61 and, for each, internalabsorbance [%] for a 1 mm path length was determined from the differenceof (1) an 10× sample's transmittance and reflectance sum and (2) thecorresponding as-made sample's transmittance and reflectance sum.

Transmittance spectra for example glass G and Samples 37-61 wereobtained using the commercially available a Hitachi U4001spectrophotometer equipped with 60 mm diameter integrating sphere. TheHitachi U4001 spectrophotometer was configured with followingmeasurement parameters: in the range of λ [nm] from 200-800, thesettings were Scan Speed: 120 nm/min and Bandwidth-PMT-3.0 nm and, witha detector change at 800 nm, in the range of λ [nm] from 800-2500, thesettings were Scan Speed: 300 nm/min and Bandwidth-PbS-Servo, Gain-4while in the range of λ [nm] from 200-340, the source was deuteriumbased and, with a source change at 340 nm, in the range of λ [nm] from340-2500, the source was tungsten halogen based. No aperture was usedover the entire range of λ [nm] from 200-2500 nm. The surfaces of eachsample was polished to an optical finish. Prior to measurement, theflats of each sample were cleaned using a first low linting wipersaturated with a solution of 1% micro soap concentrate in deionized (DI)water; rinsed using DI water; dried using a second linting wiper; andfinally wiped using a third wiper dampened with HPLC grade reagentalcohol.

Reflectance spectra for example glass G and Samples 37-61 were obtainedusing the commercially available a Perkin Elmer Lamda 950spectrophotometer with a 60 mm diameter integrating sphere. The PerkinElmer Lamda 950 spectrophotometer was configured with followingmeasurement parameters: in the range of λ [nm] from 200-860, thesettings were Scan Speed: 480 nm/min and Bandwidth-PMT-3.0 nm and, witha detector change at 860 nm, in the range of λ [nm] from 860-2500, thesettings were Scan Speed: 480 nm/min and Bandwidth-PbS-Servo, Gain-5while in the range of λ [nm] from 200-340, the source was deuteriumbased and, with a source change at 340 nm, in the range of λ [nm] from340-2500, the source was tungsten halogen based. No aperture was usedover the entire range of λ [nm] from 200-2500 nm. The surfaces of eachsample was polished to an optical finish. Prior to measurement, theflats of each sample were cleaned using a first low linting wipersaturated with a solution of 1% micro soap concentrate in deionized (DI)water; rinsed using DI water; dried using a second linting wiper; andfinally wiped using a third wiper dampened with HPLC grade reagentalcohol.

Table XII summarizes average, minimum, and maximum internal absorbance[%] for 1 mm path length for Samples 37-61 while FIG. 11 graphicallydepicts the internal absorbance [%] for 1 mm path length over the entirerange of λ [nm] from about 250-2500 for Samples 37-61 and FIG. 12graphically depicts the internal absorbance [%] for 1 mm path lengthover the entire range of λ [nm] from about 250-800 for Samples 37-61.

TABLE XII Samples 37-61 Treated for 8 [h] at 410° C. Using a 5 wt %AgNO3 - 95 wt % KNO3 Bath Internal Absorbance [%] for 1 mm path length λ[nm] Average Minimum Maximum 250 0.03 0.00 0.07 262 0.02 −0.06 0.11 2740.26 0.13 0.41 286 0.67 0.56 0.79 300 0.99 0.91 1.06 312 1.10 0.99 1.17324 1.11 0.93 1.20 336 1.09 0.89 1.21 350 1.05 0.83 1.20 362 1.00 0.751.19 374 0.93 0.63 1.17 386 0.83 0.50 1.13 400 0.69 0.36 1.07 412 0.570.26 0.98 424 0.45 0.19 0.87 436 0.35 0.13 0.74 450 0.26 0.09 0.59 4620.20 0.06 0.48 474 0.16 0.05 0.39 486 0.12 0.03 0.31 500 0.09 0.03 0.24512 0.08 0.02 0.20 524 0.06 0.02 0.17 536 0.05 0.01 0.14 550 0.04 0.010.11 562 0.03 0.01 0.10 574 0.03 0.01 0.08 586 0.02 0.00 0.07 600 0.020.00 0.06 612 0.02 0.00 0.05 624 0.01 0.00 0.04 636 0.01 0.00 0.04 6500.01 0.00 0.03 662 0.01 0.00 0.03 674 0.01 0.00 0.02 686 0.01 0.00 0.02700 0.00 0.00 0.02 712 0.00 0.00 0.01 724 0.00 0.00 0.01 736 0.00 0.000.01 750 0.00 0.00 0.01 762 0.00 0.00 0.01 774 0.00 0.00 0.01 786 0.000.00 0.00 800 0.00 0.00 0.00

1. A colored glass formulated to be ion exchangeable comprising: a. oneor more metal containing dopants formulated to impart a preselectedcolor; b. following an ion exchange treatment (IOX) up to about 64hours: i. having at least one surface under a compressive stress (σ_(s))comprising at least about 500 MPa; ii. the at least one surface underthe compressive stress (σ_(s)) exhibiting a depth of layer (DOL)comprising at least about 15 μm; and iii. a color difference (ΔE) in theCIELAB color coordinates space of the preselected color of the coloredglass after IOX treatment and before IOX treatment determined fromspecular transmittance measurements using a spectrophotometercomprising:
 7. up to about 8.2 when measurement results obtained betweenabout 200 nm-2500 nm are presented in CIELAB color space coordinates foran observer angle of 10° and a CIE illuminant A; or
 8. up to about 9.1when measurement results obtained between about 200 nm-2500 nm arepresented in CIELAB color space coordinates for an observer angle of 10°and a CIE illuminant F02; or
 9. up to about 8.4 when measurement resultsobtained between about 200 nm-2500 nm are presented in CIELAB colorspace coordinates for an observer angle of 10° and a CIE illuminant D65;or
 10. up to about 5.2 when measurement results obtained between about360 nm-750 nm are presented in CIELAB color space coordinates for anobserver angle of 10° and a CIE illuminant A; or
 11. up to about 6.3when measurement results obtained between about 360 nm-750 nm arepresented in CIELAB color space coordinates for an observer angle of 10°and a CIE illuminant F02; or
 12. up to about 6.5 when measurementresults obtained between about 360 nm-750 nm are presented in CIELABcolor space coordinates for an observer angle of 10° and a CIEilluminant D65; and c. SiO₂ comprising at least about 40 mol %.
 2. Thecolored glass of claim 1, further comprising Al₂O₃; at least one alkalimetal oxide of the form R₂O, wherein R comprises one or more of Li, Na,K, Rb, and Cs; and one or more of B₂O₃, K₂O, MgO, ZnO, and P₂O₅.
 3. Thecolored glass of claim 1, wherein: c. SiO₂ comprises from about 40 mol %to about 70 mol %; d. Al₂O₃ comprises from about 0 mol % to about 25 mol%; e. B₂O₃ comprises from 0 mol % to about 10 mol %; f. Na₂O comprisesfrom about 5 mol % to about 35 mol %; g. K₂O comprises from 0 mol % toabout 2.5 mol %; h. MgO comprises from 0 mol % to about 8.5 mol %; i.ZnO comprises from 0 mol % to about 2 mol %; j. P₂O₅ comprises fromabout 0 to about 10%; k. CaO comprises from 0 mol % to about 1.5 mol %;l. Li₂O comprises from 0 mol % to about 20 mol %; m. Rb₂O comprises from0 mol % to about 20 mol %; and n. Cs₂O comprises from 0 mol % to about20 mol %.
 4. The colored glass of claim 1, wherein one or more metalcontaining dopants formulated to impart a preselected color comprisesone or more of transition metals, one or more of rare earth metals, orone or more of transition metals and one or more of rare earth metals.5. The colored glass of claim 4, wherein one or more metal containingdopants sources comprises one or more of one or more of Au, Ag, Cu, Ni,Co, Fe, Mn, Cr, V, Ti, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm,Yb, and Lu.
 6. The colored glass of claim 1, wherein one or more metalcontaining dopants formulated to impart a preselected color comprisesone or more of Au, Ag, Cu, Ni, Co, Fe, Mn, Cr, and V.
 7. The coloredglass of claim 2, wherein a sum of the mol % of R₂O+Al₂O₃+MgO+ZnOcomprises at least about 25 mol %.
 8. The colored glass of claim 1,wherein the ion exchange treatment (IOX) is at between about 350° C. and500° C. for between about 1 hours and 64 hours.
 9. The colored glass ofclaim 1, wherein: iii. the color difference (ΔE) in the CIELAB colorcoordinate space of the preselected color of the colored glass after IOXtreatment and before IOX treatment determined from speculartransmittance measurements using a spectrophotometer comprises:
 7. up toabout 3.5 when measurement results obtained between about 200 nm-2500 nmare presented in CIELAB color space coordinates for an observer angle of10° and a CIE illuminant A; or
 8. up to about 3.6 when measurementresults obtained between about 200 nm-2500 nm are presented in CIELABcolor space coordinates for an observer angle of 10° and a CIEilluminant F02; or
 9. up to about 3.3 when measurement results obtainedbetween about 200 nm-2500 nm are presented in CIELAB color spacecoordinates for an observer angle of 10° and a CIE illuminant D65; or10. up to about 5.2 when measurement results obtained between about 360nm-750 nm are presented in CIELAB color space coordinates for anobserver angle of 10° and a CIE illuminant A; or
 11. up to about 6.3when measurement results obtained between about 360 nm-750 nm arepresented in CIELAB color space coordinates for an observer angle of 10°and a CIE illuminant F02; or
 12. up to about 6.5 when measurementresults obtained between about 360 nm-750 nm are presented in CIELABcolor space coordinates for an observer angle of 10° and a CIEilluminant D65; and
 10. The colored glass of claim 1, wherein thecolored glass comprises a glass article comprising a thickness of up toabout 1 mm.
 11. The colored glass of claim 1, further comprising atleast one fining agent comprising one or more of F, Cl, Br, I, As₂O₃,Sb₂O₃, CeO₂, SnO₂, and combinations thereof.
 12. A method of making aglass article having at least one surface under a compressive stress(σ_(s)), the at least one surface under the compressive stress (σ_(s))exhibiting a depth of layer (DOL), and a preselected colored at leastone surface, the method comprising communicating at least one surface ofan aluminosilicate glass article comprising SiO₂ comprising at leastabout 40 mol % and a bath comprising one or more metal containing dopantsources and formulated to impart the preselected color to thealuminosilicate glass article by an ion exchange treatment of thealuminosilicate glass article at a temperature between about 350° C. andabout 500° C. for a sufficient time up to about 64 hours to impart thecompressive stress (σ_(s)), the depth of layer (DOL), and thepreselected color at least one surface of the aluminosilicate glass. 13.The method of claim 12, wherein the compressive stress (σ_(s))comprising at least about 500 MPa and the at least one surface under thecompressive stress (σ_(s)) exhibits a depth of layer (DOL) comprising atleast about 15 μm.
 14. The method of claim 12, wherein thealuminosilicate glass comprises: a. SiO₂ comprises from about 40 mol %to about 70 mol %; b. Al₂O₃ comprises from about 0 mol % to about 25 mol%; c. B₂O₃ comprises from 0 mol % to about 10 mol %; d. Na₂O comprisesfrom about 5 mol % to about 35 mol %; e. K₂O comprises from 0 mol % toabout 2.5 mol %; f. MgO comprises from 0 mol % to about 8.5 mol %; g.ZnO comprises from 0 mol % to about 2 mol %; h. P₂O₅ comprises fromabout 0 to about 10%; i. CaO comprises from 0 mol % to about 1.5 mol %;j. Li₂O comprises from 0 mol % to about 20 mol %; k. Rb₂O comprises from0 mol % to about 20 mol %; and l. Cs₂O comprises from 0 mol % to about20 mol %.
 15. The method of claim 12, wherein the bath comprises acomposition comprising (1) one or more salts comprising a strengtheningion source, optionally: (a) when the aluminosilicate glass comprises alithium aluminosilicate glass the one or more strengthening ion sourcescomprise one or more ions of sodium (Na⁺), potassium (K⁺), rubidium(Rb⁺), and/or cesium (Cs⁺) exchangeable for lithium (Li⁺) ions; or (b)when the aluminosilicate glass comprises a sodium aluminosilicate glassthe one or more strengthening ion sources comprise one or more ions ofpotassium (K⁺), rubidium (Rb⁺), and/or cesium (Cs⁺) exchangeable forsodium (Na⁺) ions; or (c) when the aluminosilicate glass comprises apotassium aluminosilicate glass the one or more strengthening ionsources comprise one or more ions of rubidium (Rb⁺), and/or cesium (Cs⁺)exchangeable for potassium (K⁺); (2) the one or more metal containingdopant sources, and (3) a melting temperature less than or equal to theion exchange treatment temperature.
 16. The method of claim 12, whereinthe one or more metal containing dopants sources comprises one or moreof transition metals, one or more of rare earth metals, or one or moreof transition metals and one or more of rare earth metals.
 17. Themethod of claim 16, wherein the one or more metal containing dopantssources comprises one or more of one or more of Au, Ag, Cu, Ni, Co, Fe,Mn, Cr, V, Ti, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, andLu.
 18. The method of claim 12, wherein the one or more metal containingdopants sources comprises one or more of one or more of Au, Ag, Cu, Ni,Co, Fe, Mn, Cr, and V.
 19. The method of claim 12, wherein the one ormore salts comprises a formulation comprising one or more of a halide,cyanide, carbonate, chromate, a nitrogen oxide radical, manganate,molybdate, chlorate, sulfide, sulfite, sulfate, vanadyl, vanadate,tungstate, and combinations of two or more of the proceeding.
 20. Themethod of claim 19, wherein the one or more salts comprises aformulation comprising one or more of a metal halide, carbonate,chromate, a nitrate, manganate, sulfide, sulfite, sulfate, vanadyl,vanadate, and combinations of two or more of the proceeding.
 21. Amethod of making a colorfast, ion exchangeable glass comprising: a.forming a glass composition comprising: i. SiO₂ comprising at leastabout 40 mol %; ii. Al₂O₃; and iii. one or more metal containing dopantsin amounts formulated to impart a preselected color, wherein followingan ion exchange treatment (10×) up to about 64 hours, the ion exchangedglass article comprises
 1. at least one surface under a compressivestress (σ_(s)) comprising at least about 500 MPa;
 2. the at least onesurface under the compressive stress (σ_(s)) exhibiting a depth of layer(DOL) comprising at least about 15 μm; and
 3. a color difference(ΔE=[{ΔL*}²+{Δ*}²+{Δb*}²]^(0.5)) in the CIELAB color space coordinatesof the preselected color of the colored glass after IOX treatment andbefore IOX treatment determined from specular transmittance measurementsusing a spectrophotometer comprising: a. up to about 8.2 whenmeasurement results obtained between about 200 nm-2500 nm are presentedin CIELAB color space coordinates for an observer angle of 10° and a CIEilluminant A; or b. up to about 9.1 when measurement results obtainedbetween about 200 nm-2500 nm are presented in CIELAB color spacecoordinates for an observer angle of 10° and a CIE illuminant F02; or c.up to about 8.4 when measurement results obtained between about 200nm-2500 nm are presented in CIELAB color space coordinates for anobserver angle of 10° and a CIE illuminant D65; or d. up to about 5.2when measurement results obtained between about 360 nm-750 nm arepresented in CIELAB color space coordinates for an observer angle of 10°and a CIE illuminant A; or e. up to about 6.3 when measurement resultsobtained between about 360 nm-750 nm are presented in CIELAB color spacecoordinates for an observer angle of 10° and a CIE illuminant F02; or f.up to about 6.5 when measurement results obtained between about 360nm-750 nm are presented in CIELAB color space coordinates for anobserver angle of 10° and a CIE illuminant D65.
 22. The method of makingthe colorfast, ion exchangeable glass of claim 21, wherein the glasscomposition further comprising at least one alkali metal oxide of theform R₂O, wherein R comprises one or more of Li, Na, K, Rb, and Cs; andone or more of B₂O₃, K₂O, MgO, ZnO, and P₂O₅.
 23. The method of makingthe colorfast, ion exchangeable glass of claim 21, wherein: i. SiO₂comprises from about 40 mol % to about 70 mol %; ii. Al₂O₃ comprisesfrom about 0 mol % to about 25 mol %; iii. B₂O₃ comprises from 0 mol %to about 10 mol %; iv. Na₂O comprises from about 5 mol % to about 35 mol%; v. K₂O comprises from 0 mol % to about 2.5 mol %; vi. MgO comprisesfrom 0 mol % to about 8.5 mol %; vii. ZnO comprises from 0 mol % toabout 2 mol %; viii. P₂O₅ comprises from about 0 to about 10%; ix. CaOcomprises from 0 mol % to about 1.5 mol %; x. Li₂O comprises from 0 mol% to about 20 mol %; xi. Rb₂O comprises from 0 mol % to about 20 mol %;and xii. Cs₂O comprises from 0 mol % to about 20 mol %.
 24. The methodof making the colorfast, ion exchangeable glass of claim 21, wherein theone or more metal containing dopants formulated to impart a preselectedcolor comprises one or more of transition metals, one or more of rareearth metals, or one or more of transition metals and one or more ofrare earth metals.
 25. The method of making the colorfast, ionexchangeable glass of claim 24, wherein the one or more metal containingdopants sources comprises one or more of one or more of Au, Ag, Cu, Ni,Co, Fe, Mn, Cr, V, Ti, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm,Yb, and Lu.
 26. The method of making the colorfast, ion exchangeableglass of claim 21, wherein the one or more metal containing dopantsformulated to impart a preselected color comprises one or more of Au,Ag, Cu, Ni, Co, Fe, Mn, Cr, and V.
 27. The method of making thecolorfast, ion exchangeable glass of claim 22, wherein a sum of the mol% of R₂O+Al₂O₃+MgO+ZnO comprises at least about 25 mol %.